python: left join
new_df = df_1.merge(df_2, on='id', how='left', indicator=True)python: left join
new_df = df_1.merge(df_2, on='id', how='left', indicator=True)pandas left join
df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")pandas merge two columns from different dataframes
#suppose you have two dataframes df1 and df2, and
#you need to merge them along the column id
df_merge_col = pd.merge(df1, df2, on='id')merge two columns name in one header pandas
df['A'] = df[a_cols].apply(' '.join, axis=1)Copyright © 2021 Codeinu
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